Re: RAC question, Private IP not really private, any harm?

From: Mark D Powell <>
Date: Mon, 24 Aug 2009 07:40:12 -0700 (PDT)
Message-ID: <>

On Aug 24, 9:01 am, charles <> wrote:
> Dear Group,
> In our RAC environment, our private IP is not really private, it is
> just another public IP on a different subnet.  PRD can communicate
> with TEST server through private IP through a router.
> I am recommending our network to correct this, but we are in business
> for quite some time without any problem with current configuration.
> Could anybody tell me what is the harm if private IP is not private?
> Thanks

You can actually configure the RAC interconnect to over your public network and it will work; however, you really want a private dedicated connection for performance reasons. If your system comes under load the current configuration may well become an issue.

Just because the current set up is working satisfactory does not mean that ths issue should not be addressed, but if the current setup is working fine you need to ask how likely is the load to increase? Are there currently times in our processing where the interconnect performance is an issue. How busy is the subnet? What else uses the same subnet? How likely is conflict?

It may be you have no pressing need to make any change.

HTH -- Mark D Powell -- Received on Mon Aug 24 2009 - 09:40:12 CDT

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